Character set that is used to encode result of fold()/unfold(). It may be string or MIME::Charset object. If a special value "_UNICODE_" is specified, result will be Unicode string. Default is the value of Charset option.

Instance method. fold() folds lines of string STRING and returns it. Surplus SPACEs and horizontal tabs at end of line are removed, newline sequences are replaced by that specified by Newline option and newline is appended at end of text if it does not exist. Horizontal tabs are treated as tab stops according to TabSize option.

By the first style, following options may be specified for METHOD argument.